Updated the macosx backed figure manager show function to bring the
figure to the front upon execution.
insert deprecation warning for set_graylevel
add documentation of graylevel deprecation
points_in_path etc. should return bool.

Fix #3824
Merge pull request #3812 from jbmohler/deprecate_graylevel

API : insert deprecation warning for set_graylevel
Merge pull request #2743 from cimarronm/macosx_show_orderfront

Updated the macosx backed figure manager show function to bring the window to the front.
Merge pull request #3824 from mdboom/contains-bool

Path.contains_points() returns a uint8 array instead of a bool array
DOC: image tutorial touch-up

- expand some text regarding backend usage and IPython notebook plot
- improve style a bit (PEP 8)
- shorten array printout
- convert image resizing example to use PIL
- replace pyplot discussion in top material
- remove matplotlib argument to IPython in intro
Merge remote-tracking branch 'msarahan/ImageTutorialNotebookEdit'

Conflicts:
	doc/users/image_tutorial.rst
Merge pull request #3830 from jenshnielsen/master

Merge of #3402
Remove deprecated nonorm and normalize
Merge pull request #3832 from jenshnielsen/norm_deprecated

Remove deprecated nonorm and normalize
backend_wx: delete remaining lines for removal of printer support

This just finishes off the process; most of the removal was done
in #84ffb60.
Merge pull request #3839 from efiring/wx_printer_last_deletion

backend_wx: delete remaining lines for removal of printer support